Keto Spanish cauliflower rice that tastes like actual Spanish rice — savory tomato, onion, garlic, and cumin sauteed right in, and just 4.5g net carbs. It's my go-to meal prep side, and I cook a double batch every single week.
I started making this Spanish cauliflower rice back in 2019 when I was trying to find a side dish that could hold up through five days of meal prep. This is the one that stuck. I make a double batch every Sunday, portion it into containers, and by Friday it still tastes good reheated in a pan with a little extra oil.
The trick that took me a few batches to figure out: blend the tomato sauce for a full minute, not just a quick pulse. My first few attempts, I gave the tomatoes and garlic maybe 15 seconds in the blender and the sauce came out chunky and uneven. It pooled in some spots and left other bites dry. Once I committed to a solid 60-second blend, the sauce coated every single grain of cauliflower rice evenly. That one change made the biggest difference in how the finished dish tasted.
The other discovery came from a reader who accidentally doubled the cumin. She'd made it six times already and on batch four, she went heavy on the cumin by mistake. Said it tasted so much closer to real Spanish rice that she just kept doing it on purpose. I tried it myself and she's right. If you want that deeper, more authentic flavor, go with a full teaspoon of cumin instead of half. I do it every time now.
This pairs with almost anything I'm making for dinner. I serve it alongside keto tortillas for taco night, next to grilled chicken thighs, or stuffed into peppers. If you're into cauliflower sides, my cauliflower fried rice is the Asian-inspired version of the same idea, and the cilantro lime cauliflower rice is what I make when I want something lighter. Throw a Mexican coleslaw on the side and you've got a full keto spread without spending an hour in the kitchen.
What I like about this recipe is that it doesn't try to be complicated. Five steps, one pan, and about 4.5g net carbs per serving compared to 45g+ in regular Spanish rice. That's the kind of low carb swap that actually makes sense because you're not sacrificing flavor for it. The cumin and tomato do all the heavy lifting, and the cauliflower just absorbs everything.
Pre riced cauliflower is sold in the produce section near the bagged lettuce if you want to skip this step. If you rice your own and don’t have a food processor, a cheese grater works. Cut the stem off, cut the head into large chunks, and grate the chunks on the large hole side of the grater. The grater attachment on a food processor does the same job.
Leftovers also freeze well in a freezer safe bag for up to 3 months.
How to Make Spanish Cauliflower Rice
I've made this with both fresh and frozen cauliflower rice, and both work as long as you handle the moisture right. Fresh gives you slightly better texture. Frozen is faster (I grab it when I don't feel like hauling out the food processor), but you need to thaw it completely and squeeze out the extra water with a clean towel before it hits the pan. Skip that step and you'll end up steaming the rice instead of sauteing it.
If you're starting from a whole head of cauliflower, cut it into florets and pulse in a food processor until the pieces are rice-sized. Don't over-process or you'll get cauliflower paste. I do about 8-10 short pulses and that gets it right.
The sauce is where most people go wrong. Blend the tomatoes, onion, and garlic for a full 60 seconds until it's completely smooth. A quick 15-second pulse leaves chunks that don't coat the rice evenly. I learned this the hard way and a reader confirmed the same thing independently. Once you commit to a proper blend, every bite tastes like the last.
For a low carb side dish with even more depth, try adding a quarter teaspoon of smoked paprika with the cumin. I haven't officially added it to the recipe yet, but it's the next variation I'm testing. If you like your cauliflower roasted instead of sauteed, my air fryer cauliflower is worth trying too.
Add tomatoes, onion and garlic to a blender or food processor. Puree until smooth. Set aside.
2
Sauté cauliflower
Heat oil in a skillet over medium-high heat. Add cauliflower and sauté for 2 minutes.
3
Add sauce
Stir in tomato puree and cook for additional 2 minutes.
4
Add flavor
Add broth, salt, cumin, mustard and zucchini. Cover and continue to cook until cauliflower rice and zucchini are softened and most of the liquid is evaporated.
5
Stir in cilantro
Remove from heat and stir in cilantro.
Nutrition
Per serving: 1/4 of recipe
Calories
140
Fat
10.2g
Protein
4.1g
Total carbs
7.7g
Net carbs
4.5g
Nutrition is an estimate calculated from the ingredients listed. Brands vary, so check labels if you track closely.
Frequently Asked Questions
Can I use frozen cauliflower rice instead of fresh?
I use frozen cauliflower rice at least half the time and it works great. The key is thawing it completely first, then squeezing out the excess moisture with a clean kitchen towel. If you skip that step, the rice steams instead of sauteing and you lose that slight toastiness you get from the hot oil. I've made this side by side with fresh and frozen, and once the sauce is on, my family can't tell the difference.
How many net carbs does this have compared to regular Spanish rice?
I calculated about 4.5g net carbs per serving with this keto version, compared to 45-53g in a typical serving of regular Spanish rice made with white rice. That's a massive difference for basically the same flavor profile. The cumin, tomato, and garlic do all the work, so you're not missing anything except the carb load.
How do I rice my own cauliflower at home?
I cut a head of cauliflower into florets and pulse them in my food processor about 8-10 times until the pieces are rice-sized. The mistake I made early on was holding the pulse too long and ending up with cauliflower paste. Short, quick pulses are the move. One medium head gives me roughly 4 cups, which is exactly what this recipe calls for.
Can I add bell peppers or other vegetables?
I've added diced bell pepper a few times and it works well. Dice it small (about the same size as the zucchini) and toss it in with the cauliflower rice during the saute step. Red or orange bell pepper adds a little sweetness that plays nicely with the cumin. I've also tried spinach stirred in at the very end, and it wilts down in about 30 seconds without adding much volume. Both are solid additions if you want a little more going on. My broccoli cauliflower salad is another good way to use up extra cauliflower if you bought a big head.
Can I make this spicy?
One of my readers threw a small seeded jalapeno into the blender with the tomatoes and garlic, and I tried it myself after reading her comment. Completely hollow, no seeds, so there's no real heat. But it adds this background warmth underneath the cumin that makes the whole dish taste more layered. I've been doing it that way ever since. If you want actual spice, leave a few seeds in or add a pinch of cayenne with the cumin.
What protein pairs best with this for a full keto meal?
I serve this with chicken thighs more than anything else. Season them with cumin and chili powder to keep the Mexican flavor going, and you've got a full plate. It also works next to carne asada, ground beef taco bowls, or grilled shrimp. On nights when I'm keeping it simple, I just add a fried egg on top. If you want to round out the meal with another side, grilled vegetables or a simple salad balance it out.
How should I store and reheat leftovers?
I store mine in airtight containers in the fridge and it stays good for 4-5 days. For reheating, I always use a pan over medium heat with a little avocado oil rather than the microwave. The pan gives you back some of that sauteed texture. The microwave works in a pinch but the rice gets softer. I make a double batch every Sunday specifically because this reheats so well. Try my cauliflower tots if you're looking for another cauliflower side that meal preps well.
This holds up better than any cauliflower rice side I’ve made. I drained the canned tomatoes and used that juice instead of the chicken broth, only because I was out of broth that night. The cumin came through a lot clearer and I haven’t gone back since.
Skip the cilantro when you batch it, stir it in fresh per serving. Day four and it still tastes like it just came off the stove. Five servings, whole work week covered.
Day four tasting fresh is the whole point of batch cooking this one. I’ve been dumping all the cilantro in at the start, losing it by day three. Doing it your way next time.
My husband can’t tell cauliflower from rice in most recipes. He walked in while the cumin and tomato were cooking and asked if I was making Spanish rice. That’s when I knew this one was staying on the list.
The smell is the hardest thing to fake with cauliflower, and this one nails it. Cumin and tomato together just read as Spanish rice to your brain before you even taste it.
Making this for a spring potluck and need to triple the batch. Will crowding the skillet mess up the cauliflower, or does it hold up okay in a bigger pot with the lid on?
Crowding will ruin it (the cauliflower steams instead of sautés and goes mushy). For a triple batch I’d do two rounds in a wide pan or split between two skillets. Skip the lid.
Fire-roasted in the blender step, that’s a good call. The char flavor gets distributed through the whole base instead of just sitting on top. Haven’t used them in this one specifically but testing it this week.
Every other cauliflower rice recipe just tastes like sad cauliflower. Blending the tomatoes into the base is what finally makes this taste like actual Spanish rice.
